Artificial insemination method for reproductive channel of animals and assembly therefor

An artificial insemination method for an reproductive channel of animals comprises the steps: receiving an outer tube in a first sheath and receiving an inner tube in a second sheath; indirectly controlling the outer tube through the first sheath till an front end of the outer tube penetrating through an front end of the first sheath and extending beyond the first sheath for intruding an reproductive channel of animals; indirectly controlling the outer and inner tubes through the first and second sheaths till an rear end of the outer tube penetrating through an rear end of the first sheath, and an front end of the inner tube penetrating through an front end of the second sheath; indirectly controlling the inner tube through the second sheath till the front end of the inner tube penetrating through the outer tube, and then intruding the inner tube into a predetermined position of the reproductive channel; and indirectly controlling the inner tube through the second sheath till an rear end of the inner tube pen